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Bug 794727: Translate asynchronously-animated transforms by the offset to their reference frame when sampling. r=mattwoodrow

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This commit is contained in:
Chris Jones 2012-09-27 20:14:33 -07:00
parent c185f04347
commit 9397b0a053
1 changed files with 12 additions and 3 deletions
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15
gfx/layers/ipc/CompositorParent.cpp
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@ -618,10 +618,19 @@ SampleValue(float aPortion, Animation& aAnimation, nsStyleAnimation::Value& aSta
nsCSSValueList* interpolatedList = interpolatedValue.GetCSSValueListValue();
TransformData& data = aAnimation.data().get_TransformData();
nsPoint origin = data.origin();
int32_t auPerCSSPixel = nsDeviceContext::AppUnitsPerCSSPixel();
gfx3DMatrix transform =
nsDisplayTransform::GetResultingTransformMatrix(nullptr, data.origin(), nsDeviceContext::AppUnitsPerCSSPixel(),
&data.bounds(), interpolatedList, &data.mozOrigin(),
&data.perspectiveOrigin(), &data.perspective());
nsDisplayTransform::GetResultingTransformMatrix(
nullptr, origin, auPerCSSPixel,
&data.bounds(), interpolatedList, &data.mozOrigin(),
&data.perspectiveOrigin(), &data.perspective());
// NB: See nsDisplayTransform::GetTransform().
gfxPoint3D newOrigin =
gfxPoint3D(NS_round(NSAppUnitsToFloatPixels(origin.x, auPerCSSPixel)),
NS_round(NSAppUnitsToFloatPixels(origin.y, auPerCSSPixel)),
0.0f);
transform.Translate(newOrigin);
InfallibleTArray<TransformFunction>* functions = new InfallibleTArray<TransformFunction>();
functions->AppendElement(TransformMatrix(transform));